[FLINK-36852][pipeline-connector-paimon] Set independent MemoryPoolFactory for each table to avoid StackOverflow error.

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-paimon/src/main/java/org/apache/flink/cdc/connectors/paimon/sink/v2/PaimonWriter.java

@@ -56,9 +56,6 @@ public class PaimonWriter<InputT>
 
     // Each job can only have one user name and this name must be consistent across restarts.
     private final String commitUser;
-    // all table write should share one write buffer so that writers can preempt memory
-    // from those of other tables
-    private MemoryPoolFactory memoryPoolFactory;
 
     // deserializer that converts Input into PaimonEvent.
     private final PaimonRecordSerializer<InputT> serializer;
@@ -127,38 +124,37 @@ public class PaimonWriter<InputT>
             }
         }
         if (paimonEvent.getGenericRow() != null) {
-            FileStoreTable table;
-            table = getTable(tableId);
-            if (memoryPoolFactory == null) {
-                memoryPoolFactory =
+            StoreSinkWrite write = getWrite(tableId);
+            try {
+                write.write(paimonEvent.getGenericRow(), paimonEvent.getBucket());
+            } catch (Exception e) {
+                throw new IOException(e);
+            }
+        }
+    }
+
+    private StoreSinkWrite getWrite(Identifier tableId) {
+        FileStoreTable table = getTable(tableId);
+        if (writes.containsKey(tableId)) {
+            return writes.get(tableId);
+        } else {
+            MemoryPoolFactory memoryPoolFactory =
                     new MemoryPoolFactory(
-                                // currently, the options of all tables are the same in CDC
                             new HeapMemorySegmentPool(
                                     table.coreOptions().writeBufferSize(),
                                     table.coreOptions().pageSize()));
-            }
-            StoreSinkWrite write =
-                    writes.computeIfAbsent(
-                            tableId,
-                            id -> {
             StoreSinkWriteImpl storeSinkWrite =
                     new StoreSinkWriteImpl(
                             table,
                             commitUser,
                             ioManager,
                             false,
-                                                false,
+                            true,
                             true,
                             memoryPoolFactory,
                             metricGroup);
             storeSinkWrite.withCompactExecutor(compactExecutor);
             return storeSinkWrite;
-                            });
-            try {
-                write.write(paimonEvent.getGenericRow(), paimonEvent.getBucket());
-            } catch (Exception e) {
-                throw new IOException(e);
-            }
         }
     }